Learnt by Level Up

These Pokémon learn Mega Drain at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Kabuto	46	rock water
Kabutops	51	rock water
Bellossom	1	grass
Hoppip	30	grass flying
Skiploom	36	grass flying
Jumpluff	44	grass flying
Sunkern	10	grass
Sunflora	5	grass
Treecko	26	grass
Grovyle	13	grass
Sceptile	13	grass
Beautifly	24	bug flying
Lotad	43	water grass
Lombre	12	water grass
Ludicolo	1	water grass
Seedot	15	grass
Nuzleaf	18	grass dark
Shiftry	1	grass dark
Shroomish	16	grass
Breloom	16	grass fighting
Roselia	17	grass poison
Cradily	20	rock grass
Turtwig	25	grass
Grotle	27	grass
Torterra	27	grass ground
Budew	13	grass poison
Roserade	1	grass poison
Tangrowth	26	grass
Snivy	22	grass
Servine	24	grass
Serperior	24	grass
Cottonee	13	grass fairy
Whimsicott	1	grass fairy
Petilil	13	grass
Lilligant	1	grass
Maractus	13	grass
Foongus	15	grass poison
Amoonguss	15	grass poison
Shelmet	20	bug
Accelgor	20	bug
Morelull	15	grass fairy
Shiinotic	15	grass fairy
Sandygast	18	ghost ground
Palossand	18	ghost ground
Dhelmise	5	ghost grass
Tapu Bulu	20	grass fairy
Celesteela	13	steel flying
Sinistea	12	ghost
Polteageist	1	ghost
Calyrex	1	psychic grass
Smoliv	20	grass normal
Dolliv	20	grass normal
Arboliva	20	grass normal
Bramblin	25	grass ghost
Brambleghast	25	grass ghost
Toedscool	16	ground grass
Toedscruel	16	ground grass
Brute Bonnet	14	grass dark
Wo Chien	20	dark grass
Sceptile Mega	13	grass dragon
Calyrex Ice	1	psychic ice
Calyrex Shadow	1	psychic ghost
Lilligant Hisui	1	grass fighting

Learnt through Breeding (Egg Moves)

These Pokémon learn Mega Drain through Breeding (Egg Moves) at the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Exeggcute	0	grass psychic
Lileep	0	rock grass

Learnt by Technical Machines (TMs)

These Pokémon learn Mega Drain by Technical Machines the level specified

Name ⇧⇩	Level ⇧⇩	Type ⇧⇩
Bulbasaur	0	grass poison
Ivysaur	0	grass poison
Venusaur	0	grass poison
Butterfree	0	bug flying
Beedrill	0	bug poison
Ekans	0	poison
Arbok	0	poison
Zubat	0	poison flying
Golbat	0	poison flying
Oddish	0	grass poison
Gloom	0	grass poison
Vileplume	0	grass poison
Paras	0	bug grass
Parasect	0	bug grass
Venonat	0	bug poison
Venomoth	0	bug poison
Bellsprout	0	grass poison
Weepinbell	0	grass poison
Victreebel	0	grass poison
Tentacool	0	water poison
Tentacruel	0	water poison
Grimer	0	poison
Muk	0	poison
Gastly	0	ghost poison
Haunter	0	ghost poison
Gengar	0	ghost poison
Exeggutor	0	grass psychic
Tangela	0	grass
Mew	0	psychic
Venusaur Mega	0	grass poison
Gengar Mega	0	ghost poison
Beedrill Mega	0	bug poison
Grimer Alola	0	poison dark
Muk Alola	0	poison dark
Exeggutor Alola	0	grass dragon